Cronkite, historically, waited until everyone else already thought the war was going badly. To have his say what everyone else had already said and then call it a CIA plot seems a touch questionable.
My article said a bit more than that. You may want to go back and re-read it, perhaps more slowly and attentively this time. If specific parts of it confuse or puzzle you, please point them out, and I will be happy to explain them.